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Power Systems Technical Articles

Our experts continuously work on power systems problems, and we share solutions with Practical Reference Articles.

The main topics are earthing system modeling, power cable ratings, HV/LV electrical design, protective device coordination, and arc flash studies. We cover IEC and IEEE standards.

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Low Voltage Design
Earthing Design
High Voltage Cable Design
Arc Flash Studies
ELEK vs Competitors
Electrical Software
Digital illustration of an electrical substation with blue and orange energy flows, representing the transfer and distribution of electrical power in a grid network.
6 mins read

CDEGS vs. ELEK SafeGrid Software

Compare CDEGS vs ELEK SafeGrid for earthing design software. See differences in features, soil modelling, safety calculations, accuracy, and usability for substation earthing design.
A meshed cross-section of a cable labeled with components: environment, jacket, armour, insulation, screen, conductor, nodes, elements, and cable surface temperature nodes.
10 mins read

Validating FEM-Based Cable Ampacity Calculations Using CIGRE TB 963

Finite element method (FEM) HV cable ampacity calculations benchmarked against CIGRE TB 963 and IEC 60287 to confirm accurate high-voltage cable ratings.
ELEK Cable HV Software Screenshot - Popular
2 mins read

Comparison of CYMCAP with Cable HV Software Results

We have benchmarked our Cable HV Software current rating results for 110 kV cables against the well-known software CYMCAP. We have shown the results are virtually identical (under 1.5 % difference).
2 mins read

How to model earthing surrounded with bentonite

How to model the influence of an additional substances like bentonite surrounding the conductors of a buried earthing system on grid resistance, touch and step voltages.
A diagram illustrating various cable types used in renewable energy software.
3 mins read

Waveform Cables Current Ratings

Waveform cables are commonly used in the UK for low-voltage power networks. The term waveform refers to the way the neutral/earth wires are laid around the cores/bedding. Using this configuration enables the neutral/earth wires to be opened so a connection can be made to the conductors anywhere along its length.
Substation fence 1 1170x585 - Popular
3 mins read

Touch Voltages on Substation Metallic Fences

Should a metal fence be bonded to the substation earth grid? The metal fences around substations keep people out but they pose earthing safety challenges. These metallic fences, which are easily accessible to the public and personnel, must be adequately earthed and touch voltages on them during an electrical fault must not exceed safe limits.
1653368710952 1170x585 - Popular
5 mins read

Current Rating of Cables in Ventilated Tunnels

The methods for calculating the current rating of multiple cables installed in ventilated tunnels are explained with example calculations. Overall tunnel length and air velocity inside the tunnel have a significant impact on cable current ratings.
Oil-filled cable with finite element mesh plot for current rating calculation
3 mins read

Current Rating of High Voltage Oil-filled Cables

Explains the fundamentals of oil-filled cables current rating calculations to IEC 60287 and provides and example calculation for a 400 kV single core cable.
Motors in a factory setting_ELEK Software
1 min read

Maximum Demand

The 4 main approaches for determining the maximum demand of an electrical installation are discussed.
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